/Engine/Source/Runtime/Engine/Public/UnrealClient.h
Returns the dominant hit proxy at a given point. If X,Y are outside the client area of the viewport, returns NULL. Caution is required as calling Invalidate after this will free the returnedHHitProxy.
[HHitProxy](API\Runtime\Engine\HHitProxy) * GetHitProxy ( int32 X, int32 Y )